The reaction between potassium superoxide, KO₂, and CO₂,

is used as a source of O₂ and absorber of CO₂ in self-contained breathing equipment used by rescue workers.
How many moles of O₂ are produced when 0.300 mol of KO₂ reacts in this fashion?

Explanation:

1. Balanced chemcical reaction (given):

2. Mole ratio

Use the coefficients from the balanced chemical equation to form the mole ratio of O₂ to KO₂:

3. How many moles of O₂ are produced when 0.300 mol of KO₂ reacts in this fashion?

Mutiply 0.300 mol of KO₂ by the mole ratio:

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current